Kalhana, a Kashmiri, was the author of Rajatarangini, and is regarded as the first properly documented historian of the undivided Indian Subcontinent. He composed his book Rajatarangini, the river of kings, in A.D. 1148-49. His father, Champaka, was the minister of king Harsha of Kashmir (A.D. 1089-1101). Kalhana starts his narrative with description of Gonanda dynasty after referring to his study